MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 89ec309c384717284199d66d01669738ce37d9fb445a8f7f2259dfd6ca888f5d. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


OskiStealer


Vendor detections: 11


Intelligence 11 IOCs YARA 2 File information Comments
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SHA256 hash: 89ec309c384717284199d66d01669738ce37d9fb445a8f7f2259dfd6ca888f5d
SHA3-384 hash: c7cd553228976d4718349fea85e0effcd416017d7137c2cb914d73c44a18c9e77925a977adf1b898678d79f6456208f6
SHA1 hash: 799b97ec3adc652ff5cf89df6852e6c535e833d9
MD5 hash: 197043d984533ac65f82611414d32792
humanhash: michigan-papa-double-twelve
File name:invoice for payment.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:66'560 bytes
First seen:2022-06-08 13:54:56 UTC
Last seen:2022-06-08 14:50:35 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 768:pV3Vji/1uFIZMYIIIIIIXllllllWvfIIQIWR1gRkg8Zg0kNK2Rpg3tNp1tnZDg/5:TNCzHgeGUvDgF
Threatray 5'253 similar samples on MalwareBazaar
TLSH T1ED53D652BB448A85EA3B1B78442ADF900536AFBA7835D54944B47C633B33EC70C99CDB
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 0b1333332b2f3333 (18 x AgentTesla, 5 x AveMariaRAT, 2 x OskiStealer)
Reporter j_dubp
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
2
# of downloads :
286
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
invoice for payment.exe
Verdict:
Suspicious activity
Analysis date:
2022-06-08 19:18:59 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/69236f35-eda6-436e-8e5c-5ec0c61a0c15

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/277802/
Detection(s):
SecuriteInfo.com.BackDoor.SiggenNET.35.27125.10598.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Sending a custom TCP request
Running batch commands
Creating a process with a hidden window
Launching a process
Sending an HTTP GET request to an infection source
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
nanocore obfuscated packed
Link:
https://www.filescan.io/uploads/62a0aa76c221aaaa25c13d50/reports/ec5de085-c923-40a2-a483-3af5243032e8/overview
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
AVEMARIA
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4feeff22-60a6-464a-9fdc-54a85409ba44
Result
Threat name:
Oski Stealer, Vidar
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1009067
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
DLL side loading technique detected
Downloads files with wrong headers with respect to MIME Content-Type
Executable has a suspicious name (potential lure to open the executable)
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Writes to foreign memory regions
Yara detected Generic Downloader
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 641563 Sample: invoice for payment.exe Startdate: 08/06/2022 Architecture: WINDOWS Score: 100 46 Snort IDS alert for network traffic 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus detection for URL or domain 2->50 52 13 other signatures 2->52 8 invoice for payment.exe 15 4 2->8         started        process3 dnsIp4 40 62.197.136.3, 49705, 80 SPRINTLINKUS Netherlands 8->40 30 C:\Users\user\...\invoice for payment.exe.log, ASCII 8->30 dropped 54 Writes to foreign memory regions 8->54 56 Allocates memory in foreign processes 8->56 58 Injects a PE file into a foreign processes 8->58 13 MSBuild.exe 196 8->13         started        18 cmd.exe 1 8->18         started        file5 signatures6 process7 dnsIp8 42 chibuzorbaby.com 142.4.0.135, 49753, 49754, 49757 UNIFIEDLAYER-AS-1US United States 13->42 44 yungfang.co.vu 13->44 32 C:\ProgramData\sqlite3.dll, PE32 13->32 dropped 34 C:\ProgramData\vcruntime140.dll, PE32 13->34 dropped 36 C:\ProgramData\softokn3.dll, PE32 13->36 dropped 38 4 other files (none is malicious) 13->38 dropped 60 Tries to harvest and steal browser information (history, passwords, etc) 13->60 62 DLL side loading technique detected 13->62 64 Tries to steal Crypto Currency Wallets 13->64 20 cmd.exe 1 13->20         started        22 conhost.exe 18->22         started        24 timeout.exe 1 18->24         started        file9 signatures10 process11 process12 26 taskkill.exe 1 20->26         started        28 conhost.exe 20->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/89ec309c384717284199d66d01669738ce37d9fb445a8f7f2259dfd6ca888f5d/
Threat name:
ByteCode-MSIL.Backdoor.NanoCore
Create hunting rule
Status:
Malicious
First seen:
2022-05-26 04:17:20 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rhwdbhbyi4lsqqmz2zwqczuxhdhdpwp3irni67zclhp5nsuir5oq._file
Verdict:
malicious
Similar samples:
191db013c67081442ef5e75edd00c2572f6ec9d7f629ddac9bba8942722c061d
OskiStealer
1a2bc82de6e0c26030a3600c836329329dbcf1d4d84e031a90dd7df5355ed612
OskiStealer
27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a
OskiStealer
34ba222ef969f09ecca5506cbada7c346469a96a6af0cdd21146d4435196deda
OskiStealer
41257a21d27bcb773bb43e7b23c918d5ea4135a868b915d0fb738cd5c19af256
OskiStealer
8399c97b606bb6613f99006964a47064e402e6489574b85db7a9872f601886b2
OskiStealer
b8868eb87c7cb945704e2d0b8ec2ebdc890cd6df12f9ef0a7295582c7fd0cf1f
OskiStealer
+ 5'243 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski infostealer spyware suricata
Link:
https://tria.ge/reports/220608-q74hdsdhb6/
Behaviour
Checks processor information in registry
Delays execution with timeout.exe
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks computer location settings
Loads dropped DLL
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
yungfang.co.vu
Unpacked files
SH256 hash:
89ec309c384717284199d66d01669738ce37d9fb445a8f7f2259dfd6ca888f5d
MD5 hash:
197043d984533ac65f82611414d32792
SHA1 hash:
799b97ec3adc652ff5cf89df6852e6c535e833d9
Link:
https://www.unpac.me/results/b03f03eb-4c92-44c1-9c8d-bdf82865bc5f/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/89ec309c3847/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/89ec309c384717284199d66d01669738ce37d9fb445a8f7f2259dfd6ca888f5d

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:pe_imphash
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/277802/

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